mirror of https://github.com/lindes/ttyload.git
Initial revision
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lindes
commit
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#include <limits.h>
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#include <stdio.h>
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#include <sys/fcntl.h>
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#include <sys/stat.h>
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#include <sys/sysmp.h>
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#include <sys/types.h>
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#include <unistd.h>
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#define MIN(a,b) ((a)<(b)?(a):(b))
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#define MAX(a,b) ((a)>(b)?(a):(b))
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#define ONE 01;
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#define FIVE 02;
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#define FIFTEEN 04;
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char *loadstrings[] = { " ", "+", "x", "*", ".", "=", "X", "@" };
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typedef long load_t;
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typedef struct load_list {
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load_t one_minute;
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load_t five_minute;
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load_t fifteen_minute;
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int height1;
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int height5;
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int height15;
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} load_list;
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/* The following variables should probably be assigned using
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some sort of real logic, rather than these hard-coded
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defaults, but the defaults work for now... */
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int rows = 40,
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cols = 80,
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height = 35,
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width = 70,
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intsec = 1,
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i,j,k;
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char *kmemfile = "/dev/kmem";
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void getload(long,long,load_list *);
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int compute_height(load_t,load_t,int);
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int main(argc,argv,envp)
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int argc;
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char *argv[],
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*envp[];
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{
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int kmemfd,
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omin,omax,
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lmin,lmax;
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float multiplier;
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load_t loadaddr;
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load_list min = {LONG_MAX,LONG_MAX,LONG_MAX},
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max = {0,0,0},
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*loadavgs;
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loadavgs = (load_list *)calloc(width,sizeof(load_list));
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if(!loadavgs)
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{
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perror("malloc for loadavgs failed");
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}
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loadaddr = sysmp(MP_KERNADDR,MPKA_AVENRUN);
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if(loadaddr == -1)
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{
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perror("Couldn't determine load address");
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exit(1);
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}
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kmemfd = open(kmemfile,O_RDONLY);
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if(kmemfd < 0)
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{
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perror("Couldn't open memory file");
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exit(1);
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}
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for(i=0;i<width;i++)
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{
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if(i != 0)
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{
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sleep(intsec);
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}
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getload(kmemfd,loadaddr,&loadavgs[i]);
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/*
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printf("Load averages: %f, %f, %f\n",
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loadavgs[i].one_minute / 1024.,
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loadavgs[i].five_minute / 1024.,
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loadavgs[i].fifteen_minute / 1024.,
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NULL);
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*/
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}
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for(i=0;i<width;i++)
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{
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min.one_minute = MIN(min.one_minute,loadavgs[i].one_minute);
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min.five_minute = MIN(min.five_minute,loadavgs[i].five_minute);
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min.fifteen_minute
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= MIN(min.fifteen_minute,loadavgs[i].fifteen_minute);
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max.one_minute = MAX(max.one_minute,loadavgs[i].one_minute);
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max.five_minute = MAX(max.five_minute,loadavgs[i].five_minute);
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max.fifteen_minute
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= MAX(max.fifteen_minute,loadavgs[i].fifteen_minute);
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}
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printf("MIN Load averages: %f, %f, %f\n",
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min.one_minute / 1024.,
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min.five_minute / 1024.,
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min.fifteen_minute / 1024.,
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NULL);
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printf("MAX Load averages: %f, %f, %f\n",
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max.one_minute / 1024.,
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max.five_minute / 1024.,
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max.fifteen_minute / 1024.,
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NULL);
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lmin=MIN(min.one_minute,MIN(min.five_minute,min.fifteen_minute));
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lmax=MAX(max.one_minute,MAX(max.five_minute,max.fifteen_minute));
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printf("Overall MIN, MAX: %f, %f\n",lmin/1024.,lmax/1024.);
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omin = lmin / 1024;
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omax = (lmax / 1024) + 1;
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lmin = 1024 * omin;
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lmax = 1024 * omax;
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printf("Boundaries: %d, %d\n",omin,omax);
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printf("Long Boundaries: %d, %d\n",lmin,lmax);
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for(i=0;i<width;i++)
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{
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printf("Load averages: %f, %f, %f -- ",
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loadavgs[i].one_minute / 1024.,
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loadavgs[i].five_minute / 1024.,
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loadavgs[i].fifteen_minute / 1024.,
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NULL);
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printf("Heights: %d, %d, %d\n",
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loadavgs[i].height1 =
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compute_height(loadavgs[i].one_minute,lmax,height),
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loadavgs[i].height5 =
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compute_height(loadavgs[i].five_minute,lmax,height),
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loadavgs[i].height15 =
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compute_height(loadavgs[i].fifteen_minute,lmax,height),
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NULL);
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}
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for(j=0;j<height;j++)
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{
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printf("%6.2f ",
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( ( ((float)omax) * (height-j)) / (height))
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);
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for(i=0;i<width;i++)
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{
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k=0;
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if(loadavgs[i].height1 == j)
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k+=ONE;
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if(loadavgs[i].height5 == j)
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k+=FIVE;
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if(loadavgs[i].height15 == j)
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k+=FIFTEEN;
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printf("%s",loadstrings[k]);
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}
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printf("\n");
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}
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}
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void getload(kmemfd,loadaddr,loadavgs)
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long kmemfd,loadaddr;
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load_list *loadavgs;
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{
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if((lseek(kmemfd,loadaddr,SEEK_SET)) != loadaddr)
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{
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perror("Couldn't seek to load address");
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exit(1);
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}
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if((read(kmemfd,loadavgs,3*sizeof(load_t))) != 3*sizeof(load_t))
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{
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perror("Couldn't read load data");
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exit(1);
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}
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}
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int compute_height(thisload,maxload,height)
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load_t thisload,
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maxload;
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int height;
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{
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return(/*height-*/(height*((maxload-thisload)/(float)maxload)));
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}
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